“With great sadness, we have decided to separate, after 18 years of love and shared history,” the couple told Page Six in a joint statement. “We will continue to be supportive of each other in every way possible moving forward.”

Speculation of the couple’s split has swirled for months. Hamm, 44, and Wesfeldt, 45, made their last public appearance together on July 22 at the after-party for Netflix’s “Wet Hot American Summer: First Day of Camp” in NYC where eyewitnesses said they were “canoodling all night.”